Weisse



(No Model.)

. L. WEISSE; Lathe GhuGkfor Turning Polygo'nal Bodies.

No. 235,716. Patented Dec. 21,1880.

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m ML? UNITED STATES ATENT rrrce.

LUDWIG WEISSE, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND ERNST W. F. NATTER, OF SAME PLACE.

LATHE-CHUCK FOR TURNING POLYGONAL BODIES.

SPECIFICATION forming part of Letters Patent N0. 235,716, dated December 21, 1880.

Application filedAugnst 16, 1880. (No model.) PatentedinGermany August 7, 1879.

To all whom it may concern:

Be it known that I, LUDWIG- WEISSE, of Boston, in the county of Sufl'olk, in the State of Massachusetts, have invented certain new and useful Improvements in Lathe-Chucks for TurningPolygonal Bodies, of which the following is a specification.

The object of this invention is to turn on the common lathe polygonal bodies without the use of special complicated machinery or gears; and the invention consists of a lathechuck' the heads of which are laterally adjustable on a connecting-shaft. The heads are provided with recesses or sockets for the ends of the bodies to be turned. They are rigidly secured against axial motion by intermediate brace-pieces, which are set by pins into socket-holes of the heads. The recesses of the heads are arranged in a circle around the center shaft, so that the sides of the bodies can be successively turned, one after the other, by changing the position of the bodies after one side is finished.

In the accompanying drawings, Figure 1 represents a vertical longitudinal section of my improved lathe-chuck for turning polygonal bodies. Fig. 2 is an inside view of one of the heads of the chuck. Figs. 3 and 4 are vertical transverse sections through the center shaft and bodies to be turned, showing the head and the retainingbraces; and Fig. 5 is a perspective view of a body or article turned by my improved lathe-chuck.

Similar letters of reference indicate corresponding parts.

In the drawings, Arepresents a shaft, which is mounted between the centers of the lathe, and B B are two disk-shaped heads, the distance between which is equal to the length of the bodies to be turned by means of the lathechuck. The heads B, which are made either of wood or metal, are secured by any suitable means to the shaft A, but preferably in such a manner that one or both are laterally adjustable upon the same, for the purpose of admittingthe insertion of the bodies to be turned between the heads.

The bodies 0 O are provided at their ends with square tenons a, which are insertedinto corresponding mortises b of the heads B. The cross-section of the end tenons and end mortises, however, corresponds to the number of sides which the bodies to be turned should receive. The drawings show the lathe-chuck constructed for turning bodies having four sides, in which case, therefore, the tenons and mortises are made of square cross-section. Should the bodies be turned with three sides it would be necessary to employ tenons and mortises of triangular shape. For polygonal bodies the tenons and mortises should be in the shape of regular polygons, the sides of which correspond to the number of sides of the bodies to be turned.

For the purpose of mounting the bodies O between the heads the same are placed in po sition in the mortises, and one of the heads, or both, tightly closed up upon the same by being adjusted toward each other upon the shaft A. The axial motion of the bodies in the mortises is prevented by means of short angular or segmental brace-pieces D, which are secured to the heads B by pins or studs d, that are inserted in socket-holes cl of the heads B. The chuck is then placed between the lathe-centers and turned according to the pattern, so as to produce the profile of one side on all the bodies. One of the heads is then loosened and all the bodies between the heads turned around an angle of one hundred and eighty degrees and secured again by the heads so as to expose the opposite side to the action of the cutter. This side is then turned to the required profile, and then the third, and finally the fourth, sides turned off in the same manner. The sides of the bodies are not planes, but rotary curves, which, however, when the heads are of proper size, is hardly noticeable and not at all objectionable for practical purposes.

For turning longer bodies the size of the heads and the length of the shaft A have to be proportionately increased.

The number of bodies to be mounted between the heads of the chuck may be increased to any number, according to the size of the same.

Having thus described my invention, 1 claim as new and desire to secure by Letters Pat- In testimony that I claim the foregoing as ent m y invention I have signed my name, in pres- In a lathe-chuck for turning polygonal bodenee of two witnesses this 30th day of July,

ies, the combination of the revolving. spindle 1880. 5 A with laterally-adjustable heads B, having mortises equidistant from the spindle for re- LUDWIG WEISSE. [L. s.] ceiving the end tenons of the bodies, and with brace-pieces D, secured to the heads interme- Witnesses: diatelybetween two adjoining'bodies for elznnp- LUDWIG SGHULER SOHUTZ, :0 ing the same to the heads, substantially as set FREDK. RUDOLPH.

forth. 

